/*
 * MIT License
 *
 * Copyright (c) 2023 北京凯特伟业科技有限公司
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.je.bpm.engine.impl.variable;

import com.je.bpm.engine.impl.persistence.entity.VariableInstanceEntity;

import java.util.Arrays;

public class DeserializedObject {

    protected SerializableType type;
    protected Object deserializedObject;
    protected byte[] originalBytes;
    protected VariableInstanceEntity variableInstanceEntity;

    public DeserializedObject(SerializableType type, Object deserializedObject, byte[] serializedBytes, VariableInstanceEntity variableInstanceEntity) {
        this.type = type;
        this.deserializedObject = deserializedObject;
        this.originalBytes = serializedBytes;
        this.variableInstanceEntity = variableInstanceEntity;
    }

    public void verifyIfBytesOfSerializedObjectChanged() {
        // this first check verifies if the variable value was not overwritten with another object
        if (deserializedObject == variableInstanceEntity.getCachedValue() && !variableInstanceEntity.isDeleted()) {
            byte[] bytes = type.serialize(deserializedObject, variableInstanceEntity);
            if (!Arrays.equals(originalBytes, bytes)) {

                // Add an additional check to prevent byte differences due to JDK changes etc
                Object originalObject = type.deserialize(originalBytes, variableInstanceEntity);
                byte[] refreshedOriginalBytes = type.serialize(originalObject, variableInstanceEntity);

                if (!Arrays.equals(refreshedOriginalBytes, bytes)) {
                    variableInstanceEntity.setBytes(bytes);
                }
            }
        }
    }
}
